Valve for heating-furnaces.



No. 705,6l8. Patented July 29, i902. W. F. SHICK, R. J. LEHMAN .l I. J.WALKER.

VALVE FOR HEATING 'FURNACESI (Application filed Apr. 28, 1902.)

` (No Model.)

rfrllllllillflllll/Il nllllonilllll l ns co., PHO-mum UNITED STATESPATENT OFFICE.

WILLIAM E. sHioK, ROBERT J. LEHMAN, AND IsAAo J. WALKER, or DUQUEsNE,PENNSYLVANIA.

VALVE FQR HEATlNG-FURNACES.

SPECFCATION forming part of Letters Patent `No. 705,618, dated July 29,'1902.

Application filed April 28, 1902. Serial No. 104,905. (No model.)

1o had therein to the accompanying drawings.

This invention relates to certain new and useful improvements in valvesfor soaking-pit furnaces such as are employed for imparting an eventemperature to billets previous to passing the same to the rolls to beworked into shape.

In the manufacture of billets it is the practice to employ what istermed a soaking-pit furnace, in which the billets are placed and zowherein the mass of metal contained in the billet is rendered tosubstantially the same temperature throughout in order that the same maybe properly rolled. These furnaces have flues leading to the exterior ofthe buildin gin 2 5 which the furnaces are located, one of which lues isalways open for the admission of air' and the other of which flues isclosed or covered by a valve. These valves as heretofore constructedlast but a short time, owing to 3o the intense heat to which the saineare subjected burning them out. It is the object of this invention toovercome this difficulty by constructing a valve kept comparatively coolor at least in such a state as to prevent the as will be hereinafterfurther` explained.

4o Briefly described, the invention consists of a valve embodying aninner and an outer casing,with a space therebetween to receive Water formaintaining the valve in a comparatively cool state. y, The outer casingis provided with an opening in its top, and means is connected to thevalve for shiftingthe same to different positions, so as to cover thelines desired, and this construction, together with the other detailsentering into the invention,

5o will be hereinafter more specifically described claim.

In describing the invention in detail refererence will be had to theaccompanying drawings, forming a part of this specification, and whereinlike numerals of reference will be employed to designate like partsthroughout the several views of the drawings, in which- Figure l is acentral longitudinal sectional view of our improved valve.V Fig. 2 is atransverse vertical sectional View thereof. Fig. 3 is a longitudinalsectional View showing the device in position.

In connection with soaking-pits it is customary to provide twogas-inlets leading to opand then particularly pointed out in theposits-sides of the soaking-pit furnace and i through which the gas isadmitted alternately, so that both sides of the furnace may be fired tothe same degree of heat. These two gas inlets or iiues are alternatelyin communication with the stationaryiiue leading to the stack, which isgenerally located outside the building.

"We have shown in Fig. 3 how our improved valve is placed in positionover the ues, though have not shown the soaking-pit furnace, as ourinvention resides entirely in the construction of this valve and in themode of keeping the same `in a comparatively cool state. In Fig. 3 weshow the gas-nues a and b and a flue o, which is in communication withthe stack or chimney. (Not shown.)

Our improved valve is so Aplaced in position I 'as to establishcommunication either between the iues u, and c orthe iiues c and b, andit consists of two casings d and e, the latter within the former, with aspace f therebetween adaptedto receive and retain water for keeping thevalve from becoming unduly heated. These casings are secured together bythe cross-bar g, which serves to seal the space at the lower end, andthey. are braced `by the crossbars h and 7r,`the latter extending across`the space within the inner 'casing at .the lower edge thereof centrallyofits` length.

The casing CZ isprovided at `itstop with a suitable opening Z, and alsocarries on its outer casing at each side of the opening shafts or axlesm, which protrude beyond the valve at one side thereof to receive theforked IOO upper ends of the levers n, pivoted at their lower ends atany suitable point, and one of which 'is provided with a crank o, sothat the valve may be operated to shift from its position, as shown inFig. 3, into a position to establish communication between the ues c andb. These valves are generally surrounded by an outer casing p, which isprovided with a valve q of any approved form of construction, thepurpose of which is to regulate the quantity of air admitted within thecasingp. In order to supply water to our improved valve,weprovidesupply-linesrand rthrough the outer casing p.

When the valve is in position to establish communication between thelines ce and c, the

supply through the pipe fr' may be cut off by acock or other suitablemeans, and when the Valve is in position to establish communicationbetween dues c and b the supply through the pipe 7 may be out off in asimilar manner. It is preferable to provide a double flange t around theopenings of the llues a, b, and c, within which double ange the Valve isseated, so that the water lying within the space inclosed by the casingp will not flow into the lines, but will be drained off through thesuitable opening u. Heretofore in the use of valves for this purposethey have generally been constructed of a single sheet of metal, whichsoon becomes warped, owing to the intense heat to which it is subjected,requiring the replacing of a new valve. By

constructing the valve so as to be filled with water at all times thisdanger is entirely ob- Viated and the length of life of the valve ismaterially increased. When the gas is shut olf from flue a and turned onflue b, so as to burn in the opposite side of the furnace, the valve isshifted from the position shown in Fig. 3, so as to rest over the iluesc and b.

In the practice of our invention it will be noted that various changesmay be made in the details of construction without departing from thegeneral spirit of our invention, the main principle being the provisionof the water-cooled valve in connection with soaking pit furnaces.

Having fully described our invention, what we claim as new, and desireto secure by Letters Patent, is-

A valve for soaking-pit furnaces, comprising two seinicircular casingswith a Waterspace therebetween, the outer casing having an opening inits top, cross-bars at the top and bottom of said casing for spacing thesame apart, and means connected to the outer casing for shifting thevalve longitudinally, substantially as described.

In testimony whereof we affix our signatures in the presence of twowitnesses.

WILLIAM F. SHICK. ROBERT J. LEHMAN. ISAAC J. WALKER.

Witnesses: FRED GERDTs, WILLIS DoNEY.

